在 Blazor 服务器端应用程序中，实现 OpenID 连接时，需要定期刷新访问 Token。下面是一些步骤和代码示例，演示如何在 Blazor 服务器端应用程序中实现刷新 Token 的 OpenID 连接。

步骤1：在 Startup.cs 文件中添加以下代码，来配置身份验证和授权：

public void ConfigureServices(IServiceCollection services)
{
    // 配置身份验证和授权
    services.AddAuthentication(options => {
        options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
        options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
    })
    .AddJwtBearer(options => {
        // 从 appsettings.json 文件中获取授权服务器地址
        options.Authority = Configuration["Authentication:Authority"];
        options.RequireHttpsMetadata = true;
        options.TokenValidationParameters = new TokenValidationParameters
        {
            ValidateAudience = false
        };
        options.Events = new JwtBearerEvents
        {
            OnAuthenticationFailed = context =>
            {
                if (context.Exception.GetType() == typeof(SecurityTokenExpiredException))
                {
                    // 抛出 Token 过期异常
                    context.Response.Headers.Add("Token-Expired", "true");
                }
                return Task.CompletedTask;
            }
        };
    });

    services.AddHttpContextAccessor();

    // 添加授权策略
    services.AddAuthorization(options =>
    {
        options.AddPolicy("HasAdminRole", policy =>
        {
            policy.RequireClaim("role", "admin");
        });
    });

    // 添加 HttpClient 来用于向授权服务器发送请求
    services.AddHttpClient();
}

步骤2：在 Program.cs 文件中，将 WebAssemblyHostBuilder 替换为 WebAssemblyHostBuilderWithAuth，代码如下：

public static async Task Main(string[] args)
{
    // 初始化应用程序配置
    var builder = WebAssemblyHostBuilderWithAuth.CreateDefault(args);

    builder.RootComponents.Add("app");

    // 注册服务
    builder.Services.AddTransient(sp => new HttpClient { BaseAddress = new Uri(builder.HostEnvironment.BaseAddress) });
    builder.Services.AddScoped();

    // 设置启动时的身份验证状态
    builder.Services.AddAuthorizationCore(config =>
    {
        config.AddPolicy("Bearer", policy =>
        {
            policy.AuthenticationSchemes.Add(JwtBearerDefaults.AuthenticationScheme);
            policy.RequireAuthenticatedUser();
        });
    });

    // 构建并运行应用程序
    var host = builder.Build();

    await host.RunAsync();
}